Hey all first post here

Just a quick question on this sound I have just started to get on my computer.
I've never heard this sound before it comes about EVERY ten - fifteen minutes and lasts around five.
The sound itself is like a pulse with about two seconds of silence between the pulses. It started about an hour ago. I have not been using any other programs for about three hours now, this sound just started on its own.
Anyone know what it is?
Thanks guys
Darcey.Have you installed any new software RECENTLY ? ?
Have you checked in Control Panel/Sounds and Multimedia to see if you can find the sound and see what it's associated with ? ?Hey thanks for replying.

Yea I had installed LIMEWIRE earlier in the morning but stopped using it after trojans started being detected. I have done a complete check of my cpu for VIRUSES yet it still makes the sound. Not as regular as before though, I looked in the control panel and FOUND a sound similer to the one being made which is 'feed discovered' in internet explorer section. I'm not to sure what this is though.
Ok thanks againThat's the one...it means limewire has located a feed...
Good Luck with limewire...we'll probably see you in the Virus section before long....

Yea I don't think I'll be using limewire anymore.